Grease-gun.



I. B HENDRIX & C. DUROSSETTE.'

GREASE GUN.

APPLICATION FILED APR. 4, I-9I-4. 1,190,241. Patnted July 4,1916

2 SHEETS-SHEET 1.

L I v I a a p24 E I I J5 f Z SI J I a i r I j;

wi rnaoo go J. B. HENDRIX & C. DUROSSETTE. GREASE GUN. APPLICATION FILED APR. 4. mm.

1 1 90,241 Patented July 4, 1916.

2 SHEETS-SHEET 2.

JOS EPH B. HENDRIX AND CLYDE DUROSSETTE, OF WALSENBURG, COLORAIb.

GREASE-GUN.

Specification of Letters Patent.

Patented July 4, 1916.

Application filed April 4, 1914. Serial 1810. 829,623.

To all whom it may concern:

3e it known that we, Josnrn B. Huxmux and CLYDE Dunossnrrn, citizens of the United States, residing at \Valsenburg, in the county of Huerfano and State-of Colorado, have invented certain new and useful Improvements in Grease-Guns, of which the following is a specification. I

Our invention relates to what is commonly termed a grease gun, that is to' say, a form of syringe used for handling oils and grease to enable oil cups and grease cups on machinery to be readily filled.

As its primary object, the invention con-- templates a construction of plungeror piston whereby, through longitudinal movement of said piston in one direction, the oil or grease. is auton'iatically transferred from one to the other side thereof, and, upon a reverse movement, is forcibly fedto any one of a plurality of barrel or cylinder outlets.

A further object of the invention resides in the provision of an actuating element so associated. with the barrel or cylinder piston as to impart longitudinal movement thereto independent of a like movement on the part of said element.

A further object of the invention is to enable heavy lubricants to be quickly handled with the grease gun and to avoid the difficulty heretofore experienced in filling the grease gun with the grease.

The invention, as a stillfurther object, aims to provide an improved grease gun wherein air under pressure may be utilized, if desired, to actuate the cylinder piston,

-the actuatin; element above noted, when thus operated, being first detached or rendered inoperative.

The aboveand additional objects are accomplished by such means as'are illustrated in their preferred embodiment in the accompanying drawings, (.lescribed in the following specification and then more particularly pointed out in the claims which are appended hereto and form a part of this application,

In describing our invention in detail reference will be had to the accompanying drawings wherein like characters denote like 01' corresponding parts throughout the several views, and in which 1 Figure l is an elevationof an oiler or- .grease gun constructed in accordance with plan view.

the present invention; Fig. 2 is a section on v the line 22 of Fig. 1; Fig. 3 is a section on the line 3-3 of F g. 2; and Fig. 4 is a top Referring now to the drawings by numerals, 1 designates as an entirety the cylinder or barrel into which the grease or oil acted upon is poured. CapsQ and 3 are threaded respectivelyto the cylinder 1 at the top and bottom thereof, the former, 2, having a central opening 4 through which a sleeve like operating-element 5 extends, said element being annularly enlarged as indicated at 6 to prevent, as is apparent upon. reference .to -Fig. 2 of the drawln'gs, longitudinal bodily movement of the said sleeve independent of the cap. The bore of said sleeve 5 is threaded to receive a hollow or sleeve like operating screw 7, which screw, upon a turning of the element 5, is either bodily raised or lowered. Arms or handles 8 radiate from the periphcry of the said element 5 tion of the device by hand.

Vtithin the bore of the operating screw 7, and extending throughout the length of the said screw, is the rod 9 of a plunger or piston 10. Rod 9 is preferably swiveled on the piston 10 so that it can rotate relatively thereto. In the operation of the device by hand, the said rod 9 is made rigid with the operating screw 7 through the medium of a cotter pin 11 extending therethrough, from which arrangement, it is apparent that; the plunger 10 will bereciprocated or made to move longitudinally within the cylinder upon. a turning of the operating element 5'. Said plunger or piston 10 is provided with ports 12, said portsbeing normally closed, by means of a valve member 13 in the nature of a flat plate like spring arranged over the piston rod 9 and against the under face of the piston. I

A removable plug 14 is provided to permit, when removed, a filling of the cylinder with oil or grease. Valve controlled'outlets, 15, 16 and 17 are arranged respectively adjacent the top, bottom and middle of the cylf 'inder, any one of which is adapted to receive a flexible hose section 18 through the medium of which the Oll or grease acted upon is conveyed to the grease or oil cup to' be filled upon operation of the plunger or piston 10. As a means whereby a turning of the plunger 10 is prevented, I provide an exto facilitateoperatension: 19 integral with the plunger and working within a longitudinal groove 20 of the cylinder, said groove being opento the interior of thecylinder as indicated in Fig.

3 of the drawings. 1

Operation by hand is as follows: Plunger' or piston 10 is moved, by a turning of the element 5, to its lowermost position or to the position indicated in Fig. 2. .Plug' 14 is then removed and the cylinder or barrel filled. The several outlets being closed,

the element is turned and, being incapable of longitudinal movement, such movement is imparted tothe operating screw 7. Said screw 7 being rigid with piston rod 9, it is apparent that the piston or plunger 10 will bemade to'move longitudinally of the cylinder. As the oil or grease is compressed, the

- valve member 13 is forced from engagement with piston 10 to open ports 12, thereby permitting, upon continued operation of the element 5, the automatic transfer of theoil orgrease within the cylinder from one to the,

other side of the piston. .When transferred, the valve of the middle outlet 17 is opened,

. and, as said valve has attached thereto the being efl'ected without a like m'pvement on, the part of either the rod 9 or piston. ,Air

flexibleh'ose section 18, it is evident that upon a reverse turning of the element 5 (valve in outlet passage 16 being closed) the oil or grease within the barrel is forced, by

.movement of the piston, through the said outlet to the oilcup or-grease cup in connection with which the device is' used. The plunger having been moved to close outlet 17, the hose section 18 is detached therefrom and attached to outlet 16 at the bottom of the cylindersin which event, continued move ment of thewsaid plunger will provide for a' continued. feeding of the oil or grease in the desired manner.

When it is desired that air under pressure be used to actuate the plunger'l0, the cotter pin 11 is removed'after the-cylinder has been filled in the manner described above, theelement 5 rotated until operating screw 7 is in its uppermost position, such movement under pressure is then admitted tothe cylinder by way of outlet 16, which air being directed against the valvejiiember 13 and the under side of the plunger 'willcause the latter to move upwardly to i'orcibly feed the oil or grease in the desired; anner by way of either outlet 17 or outlet 5, the hose section 18 being of course attached thereto. The

rods 7 and 9 are connected by the cotter pin ma am 11 and the piston is lowered and the cylinder is again filled in the manner described be resorted to, when required, without sacrificing any of the advantages of our inven- 7 tion, as defined in the appended claims.

Having thus fully described our invention, what we claim as new and desire to secure by Letters Patent, is

1. In a grease gun, a cy1inder',-a sleevelike operating element mounted for rotation within'an opening of said cylinder, said ele-v ment being immovable longitudinally independent of said cylinder, a hollow sleevelike operating screw, said screw being movable longitudinally of said cylinder, a piston, a piston rod fastened to said piston, said rod being rigid withv said screw whereby to impart movement to said piston through rotation of said operatingelement,

2. In a grease gun,.a cylinder, a rotatable sleevelike operating element immovable longitudin ally with respect to said cylinder, the

bore of said element being interiorly threaded, an operating screw extending through the bore of said element, said screw being movable longitudinally through rotation of said element, a piston, and a piston rodfastened. to said piston and adapted to be detachably connected to said opera-ting screw whereby to move-said of said element.

piston by; a rotation 3. In a grease gun, a cylinder, a piston",

a piston rod,.a hollow screw rod embracing said piston rod and having detachableconnection therewith for the purpose specified, and means engaging the. said hollow rod to rotate it. 3

In testimony whereof we aflix our signatures in presence of two wltnesses.

JOSEPH B HENDRIX. CLYDE DUROSSETTE.

Witnesses:

A. M. GImRRERo,

PAUL KRIER. 

